HomeMy WebLinkAbout4.B.4. Authorize and extension agreement for a limited Phase II Environmental Site Assessment (ESA) & MPCA Petroleum Brownfields for MNDOT Parcel 37 General Business 4. B. 4.
SHAKOl'EE
TO: Mayor and City Council
Mark McNeill, City Administrator
FROM: Bruce Loney,Public Works Director
DATE: 11/05/2014
SUBJECT: Authorize an Extension Agreement for a Limited Phase II Environmental Site Assessment(ESA)&
MPCA Petroleum Brownfields Services for MNDOT Parcel 37(E)
Action Sought
Authorize an Extension Agreement with WSB&Associates,Inc.for a Limited Phase II Environmental Site
Assessment(ESA)&MPCA Petroleum Brownfields Services for MNDOT Parcel 37.
Background
The City of Shakopee is interested in purchasing MnDOT parcels 37&43 near CR 69 and TH 169. Staff had a
Phase I ESA done for these parcels to determine their environmental status.
The Phase I report revealed no Recognized Environmental Conditions(REC's).However, it did find two Historical
Recognized Environmental Conditions(HREC's)associated with Parcel 37,the former Gopher State Truck Stop.
Attached to this memo is the main body of the report with the findings,conclusions, opinion and recommendations.
The main recommendation is to do a Phase II ESA to assess current subsurface soil, soil vapor,and groundwater
conditions against current regulating criteria as an option for the property as future development.
Attached is the Phase II ESA proposal from WSB &Associates,Inc. the purpose of the Limited Phase II ESA is to
evaluate the subsurface soil conditions at the property. this evaluation will be used to determine an approximate
soil correction cost that would be incurred for future development. In addition,the property will be enrolled into
the MPCA Petroleum Brownfields Program in order for the City and successive purchasers of the property to not be
held responsible under stat statute for the contamination identified at the property
Recommendation
Staff recommends approving the extension agreement to determine the extent of environmental conditions of the
historical recognized environmental condition site for possible purchase and for possible future development.
Budget Impact
The cost of the Limited Phase II ESA&PBP Service is estimated to be$10,537.00 and to be funded out of the EDA
fund.
Relationship to Vision
This supports Goal E: Deliver effective and efficient public services by a staff of well-trained,caring,and
professional employees.
Requested Action
Authorize an Extension Agreement with WSB&Associates,Inc. for a Limited Phase II Environmental Site
Assessment(ESA)&MPCA Petroleum Brownfields Services for MNDOT Parcel 37.
Attachments: ESA Report Phase I
Phase II ESA&PBP
October 24, 2014
PHASE I
SHAKOPEE .
Environmental
City of Shakopee Site Assessment
129 S.Holmes Street • Shakopee,MN 5
(952)233-9300
Vacant Land
Parcels 69110120 and 2791 10260
Shakopee, MN 55379
1418 P ro j P c t No, 1 811-42 0
ti
•
a r 1
fi
w. s
701 Xenia Avenue South,Suite 300
�� Minneapolis,MN 55416
Tel:(763)541-4800 Fax:(763)541.1700
wsbeng.corn
Phase I Environmental Site Assessment
Vacant Land
Parcels 69110120 and 279110260
Shakopee, MN 55379
Prepared for:
City of Shakopee
129 South Holmes Street
Shakopee,MN 55379
Prepared by:
WSB &Associates, Inc.
701 Xenia Avenue South,Suite 300
Minneapolis, MN 55416
October 24, 2014
Ryan G. Spencer
Environmental and Remediation Scientist
Phase 1 En%leonine ntal Site:1<ssessment
Parcels 641111120 and 270110260
V1 SUS Project No.1811-420
Table of Contents
TITLE SHEET
LETTER OF TRANSMITTAL
ACRONYMS AND ABBREVIATIONS
TABLE OF CONTENTS
1.Summary 1
2. Introduction 3
2.1 Purpose 3
2.2 Scope of Services 3
2.3 Assessment Limitations and Assumptions 3
2.4 Special Terms and Conditions 4
2.5 Previous Environmental Documents 4
3.Site Description 7
3.1 Subject Property Location 7
3.2 Property Vicinity and Characteristics 7
3.3 Current and Historic Use of the Property 7
3.4 Description of Structures, Roads,and Improvements 7
3.5 Adjoining Properties 8
4.User Provided Information 9
5. Records Review 10
5.1 Regulatory Database Review 10
5.2 Regulatory File Review 12
5.3 Physical Setting Information 12
5.4 Historical Use Information 13
6. Site Reconnaissance 16
6.1 Methodology 16
6.2 General Site Setting 16
6.3 Exterior and Interior Observations 16
7. Interviews 18
8. Findings, Conclusions,and Opinions 19
8.1 Recognized Environmental Conditions 19
8.2 Historical Recognized Environmental Conditions I9
8.3 Controlled Recognized Environmental Conditions 20
8.4 Vapor Intrusion 20
8.5 De Minimis Conditions 20
8.6 Items of Environmental Note 21
Phase I I sis ironmental Site Assessment
Parcels 69110120 and 279110260
'%S11 Project\o. 1811.420
Table of Contents
9. Recommendations 22
10. Data Gaps 23
11. Qualifications of Environmental Professionals 24
LIST OF FIGURES
Figure 1 - Project Location
Figure 2 -USGS Topographical Map
Figure 3 -Scott County Soils
Figure 4-Surface Geology
Figure 5 - Bedrock Geology
Figure 6- County Well Index
Figure 7 - HREC Locations
LIST OF APPENDICES
Appendix A-Scott County Property Information
Appendix B - Photographic Documentation
Appendix C - User Questionnaire
Appendix D - EDR Report
Appendix E- Fire Insurance Maps (Unmapped)
Appendix F- City Directories
Appendix G -Aerial Photographs
Appendix H -Topographic Maps
Phase 1 Environmental Site Assessment
Parcels 69110120 and 279110260
1V'SI3 Project Ao, 1811-420
1. Summary
WSB & Associates, Inc. (WSB) was retained by the City of Shakopee (the City) to
conduct a Phase I Environmental Site Assessment (ESA) of the vacant land
consisting of parcels 69110120 and 279110260 in Shakopee, MN (the property).
The objective of the assessment was to identify Recognized Environmental
Conditions (RECs) associated with the property according to ASTM E1527-13
"Standard Practice for Environmental Site Assessments: Phase I Environmental Site
Assessments".
The property is located in the southwest quarter of Section 11,Township 115 North,
and Range 23 West,in Scott County, Minnesota. The property is currently owned by
the State of Minnesota Department of Transportation and is adjoined by County
Road 69 to the west, commercial properties to the north, and residential properties
to the east and south. A property location map is included as Figure 1.
WSB has performed this Phase I ESA in conformance with the scope and limitations
of ASTM Practice E1527-13. Exceptions to, or deletions from, this practice are
described in Section 2.3 of this assessment. This Phase I ESA has been prepared
exclusively for the City. No additional parties may rely on the contents of this report
unless written authorization is obtained from WSB.
This Phase I ESA has revealed no RECs and two historical recognized environmental
conditions (HRECs)associated with the property. The HRECS include:
HREC- 1:Petroleum Release(Former Gopher State Truck Stop)
This site is located on the northeastern portion of the property (parcel 69110120)
and was identified on the leaking underground storage tank (LUST) database. The
former Gopher State Truck Stop reportedly was in operation at from approximately
1957 to 1989. The associated leak (Minnesota Pollution Control Agency (MPCA) ID
701) was discovered in 1988 and resulted from a leaking 10,000 gallon leaded
gasoline underground storage tank (UST) and two 4,000 diesel USTs. All associated
USTs were reportedly removed from the site in 1989 and five groundwater
monitoring wells were installed. The site was issued site closure by the MPCA on
June 06, 1989. No monitoring wells or evidence of a petroleum leak was observed at
this site during this assessment. The documented petroleum release at the property
is considered a HREC.
HREC - 2: Volatile Organic Compounds Release (Former Gopher State Truck
Stop)
During the investigation of MPCA leak 701,volatile organic compounds (VOCs) were
also identified in groundwater samples at the property. Specifically, 1,1,2-
trichloroethene, 1,2-dicloroethane, and trichloroethene were detected in the
Phase I Environmental Site Assessment
Parcels 69110120 and 279110260
%%SR Project No.1811-420
Page 1
groundwater of the Shakopee Limestone formation at the property above their
respective Minnesota Department of Health (MDH) Health Risk Limits (HRLs).
Based on the likelihood that the compounds originated from off-site, the MPCA
issued a No Action Letter for the VOC release on August 23, 1994 conditioned on
three successive years of groundwater monitoring. A No Further Action
determination was later issued by the MPCA on June 26, 1998. The documented
VOC release at the property is considered a HREC.
Additionally,the following environmental items should be noted:
Soil and Asphalt Piles
Two soil piles and one asphalt pile were observed on the northeastern portion of
the property at the former Gopher State Truck Stop (parcel 69110120). The soil
mounds were approximately 100 cubic yards in size and were covered with
vegetation. The asphalt pile was approximately 500 cubic yards in size and
observed to be uniform. No construction debris or evidence of regulated waste was
observed in the piles during the site visit.
Concrete Foundations and Light Poles
Two large concrete foundation pieces and numerous light pole footings were
observed on the northeastern portion of the property at the former Gopher State
Truck Stop (parcel 69110120). The concrete foundation pieces were approximately
4 cubic yards in size and were removed from the ground. The light poles footings
approximately 0.5 cubic yard in size and in place during the site visit.
1'hase I Ens ironmental Site Assessment
Parcels 69110120 and 279110260
N:SI3 Project No.181 1-420
Page 2
2. Introduction
2.1 Purpose
WSB was retained by the City to conduct a Phase I Environmental Site Assessment
(ESA) of the vacant land consisting of parcels 69110120 and 279110260 in
Shakopee, MN. The objective of the assessment was to identify Recognized
Environmental Conditions (RECs) associated with the property according to ASTM
E1527-13 "Standard Practice for Environmental Site Assessments: Phase I
Environmental Site Assessments".
The ASTM E1572-13 Standard defines the term recognized environmental condition
as meaning "the presence or likely presence of any hazardous substances or
petroleum products in, on, or at a property: (1) due to any release to the
environment; (2) under conditions indicative of a release to the environment; or(3)
under conditions that pose a material threat of a future release to the environment."
The term is not intended to include de minimis condition's that generally do not
present a threat to human health or the environment and that generally would not
be the subject of an enforcement action if brought to the attention of appropriate
governmental agencies. Conditions determined to be de minimis are not recognized
environmental conditions.
WSB's understands that the City intends to redevelop the property for mixed
residential and commercial purposes.
2.2 Scope of Services
The Scope of Services performed by WSB is defined by the ASTM E1527-13
Standard and the methodologies and procedures described in the body of this
report. The ASTM E1527-13 Standard is intended to permit a user to satisfy one of
the requirements to qualify for the innocent landowner,contiguous property owner,
or bona fide prospective purchaser limitations on Comprehensive Environmental
Response, Compensation, and Liability Act (CERCLA) liability, which is the practice
that constitutes "all appropriate inquiry into previous ownership and uses of the
property with good commercial or customary practice" as defined in 42 U.S.C. 9601
(35) (B).
2.3 Assessment Limitations and Assumptions
This Phase I ESA was performed in accordance with ASTM E1527-13 Standard
Practice for Environmental Site Assessments. The property was covered with
vegetation which limited direct observation of the ground. No conditions were
encountered that were determined to be significantly limiting to the purpose of this
assessment.
Phase I Environmental Site Assessment
Parcels 69110120 and 279110260
1%S8 Project No.181 1420
Page 3
The Scope of Services for this Phase I ESA did not include the completion of soil
borings, the installation of groundwater monitoring wells, or the collection of soil,
sediment, surface water, or groundwater samples. In addition, this assessment did
not include collecting or analyzing samples for the presence of asbestos,
polychlorinated biphenyls (PCBs), lead-based paint, lead in drinking water, radon,
or urea formaldehyde as this is beyond the scope of the ASTM E1527-13.
2.4 Special Terms and Conditions
The findings and conclusions presented in this report are based on the general
guidance provided by ASTM E1527-13, available data cited in this report, and
property conditions noted at the time of the site reconnaissance. A Phase I ESA
cannot wholly eliminate the uncertainty regarding the potential for REC at the
property.
This assessment is intended to reduce, but not eliminate, uncertainty related to the
potential for RECs in connection with the property within reasonable time limits
and cost. The conclusions and recommendations contained in this report represent
WSB's professional opinions. These opinions are arrived at in accordance with
currently acceptable Phase I ESA practices at this time and are subject to the
inherent limitations of environmental assessments outlined in this section.
WSB obtained, reviewed, and evaluated information provided by property
owner/representatives, Environmental Data Resources Inc. (EDR) Report and
local/state public entities. WSB's conclusions, opinions, and recommendations are
based in part on this information. WSB's services did not include the verification of
the accuracy or authenticity of this information as this is beyond the scope of a
Phase I ESA per ASTM guidelines.
This report is based upon the standard gathered information (ASTM E1527-13) and
WSB's observations made during the site reconnaissance. Given the inherent
limitations of environmental assessment work, WSB does not guarantee that the
property is free of hazardous or potentially hazardous materials or conditions, or
that latent or undiscovered conditions will not become evident in the future. WSB's
report is prepared in accordance with WSB's Scope of Work and no other
warranties,representations,or certifications are made.
2.5 Previous Environmental Documents
WSB was provided previous environmental documents pertaining to the property
by the MPCA and Minnesota Department of Transportation (MnDOT) Office of
Environmental Stewardship. Files were reviewed both electronically and at the
MPCA's St. Paul office on October 20, 2014. Select electronic files are available upon
request. The following information was gathered during review:
Phase I Environmental Site Assessment
Parcels 69110120 and 279110260
%S S6 Project No.1811-420
Page 4
Former Gopher State Truck Stop -This site is located on the northeastern portion of
the property (parcel 69110120) and was identified on the LUST database. The
Gopher State Truck Stop reportedly was in operation at the site from approximately
1957 to 1989 with the operating address of 11551 Johnson Memorial Drive. The
associated leak (MPCA ID 701) was discovered in 1988 and resulted from a leaking
10,000 gallon leaded gasoline underground storage tank(UST) and two 4,000 diesel
USTs. All associated USTs were reportedly removed from the site in 1989 and five
groundwater monitoring wells were installed. The site was issued site closure by
the MPCA on June 06, 1989. No indications of soil correction or remediation
activities were apparent in the site files. The documentation petroleum leak at the
property is considered a historical recognized environmental condition (HREC).
In addition, during the investigation of MPCA leak 701, VOCs were identified in
groundwater samples at the site. Specifically, 1,1,2-trichloroethene, 1,2-
dicloroethane, and trichloroethene were detected in the groundwater of the
Shakopee Limestone formation at the site above their respective MDH HRLs. The
site was entered into the MPCA Voluntary Investigation and Cleanup (VIC) program
in 1994 and was issued the facility ID of VP4510. Based on the likelihood that the
compounds originated from off-site,the MPCA issued a No Action Letter for the VOC
release on August 23, 1994 conditioned on three successive year of groundwater
monitoring. A No Further Action determination was later issued by the MPCA on
June 26, 1998. The documentation of VOC release at the property is considered a
HREC.
Land Adjacent to Former Gopher State Truck Stop - According to MnDOT
environmental files, petroleum contamination was encountered in the soil adjacent
to the County Road 69 right-of-way which was previously part of the property
(parcel 69110120) prior to 1989. MnDOT completed improvements on the adjacent
right of way in 1996 during the Trunk Highway 169/101 reconstruction project.
The project included modifying the alignment of County Road 69 adjacent to the
Former Gopher State Truck Stop. MnDOT reportedly excavated approximately 6
feet below the former grade for the construction of a drainage ditch directly
adjacent to the property (parcel 69110120). The petroleum impacted soil extended
onto the property (parcel 69110120) but was not removed as part of the road
construction project. The excavated petroleum-impacted soil was reportedly
stockpiled on the property(parcel 69110120).
In 1999,the stockpiled soil was field screened for petroleum impacts. The soils with
organic headspace readings above 10 parts per million (ppm) were reportedly
hauled offsite for thermal treatment and the soils with headspace readings below 10
ppm (approximately 500 to 600 cubic yards) were thin spread on the property
(likely on both parcels 69110120 and 279110260).
Phase I Environmental Site Assessment
Parcels 69110120 and 279110260
!1`Sli Project No.1811-420
Page 5
Documentation of the petroleum-impacted soil excavation, stockpiling, and thin
spreading at the property was not included in the reviewed MPCA files. An
additional environmental drilling investigation completed in the County Road 69
right-of-way was reportedly conducted in April 2013 for Scott County. Petroleum
contamination was reportedly detected during this investigation at concentrations
exceeding regulatory criteria. WSB contacted Scott County on October 21, 2014 and
to date, the final 2013 investigation results have not been provided.
Phase I Environmental Site Assessment
Parcels 69110120 and 279110260
WSB Project No.1811-120
I'age 6
3. Site Description
3.1 Property Location
The property consists of two parcels located east of County Road 69 and
approximately 500 feet north of U.S. Highway 169 in Shakopee, MN. The property is
located in the southwest quarter of Section 11, Township 115 North, and Range 23
West, in Scott County, Minnesota. A property location map is included in Figure 1.
Property information regarding the property was obtained from Scott County's
Property Information Database. Based on this information,the property parcels are
listed as 69110120 and 279110260 and owned by the State of Minnesota
Department of Transportation. The property parcel ae listed as non-homesteaded
and total 26.16 acres in size. Copies of the Scott County Property Information sheets
are included in Appendix A.
3.2 Property Vicinity and Characteristics
The property is located in a mixed residential/commercial district with commercial
properties adjoining the property to the north and residential properties adjoining
the property to the east and south. The property is bound by the County Road 69 to
the west. The property grounds consist minimally of manicured grassland (parcel
279110260) and include a wooded section on the northeastern portion (parcel
69110120). The newly constructed paved road (Vierling Drive West) transects the
property.
3.3 Current and Historic Use of the Property
The property was historically used for agricultural purposes from at least 1940 to
1956. A truck stop (former Gopher State Truck Stop) was reportedly in operation
on the northern portion of the property from approximately 1957 to 1989. The
remaining areas of the property were utilized for agricultural purposes from 1940
to present. The property is currently vacant since 1989. Photographs documenting
the current property conditions, including a photographic location map, are
included as Appendix B.
3.4 Description of Structures, Roads,and Improvements
No buildings or structures currently are present on the property. A newly
constructed paved road (Vierling Drive West) transects the property. Two large
concrete foundations and numbers light poles were observed on the northern
portion of the property on parcel 69110120. The concrete foundation pieces
(approximately 4 cubic yards in size) were removed from the ground and the light
poles (approximately 0.5 cubic yards in size) were in place. The foundation pieces
Phase 1 Environmental Site Assessment
Parcels 69110120 and 279110260
.A SB Project No.1811.420
Page 7
and light poles are believed to be remnant from the historic truck stop (former
Gopher State Truck Stop) that occupied the property from 1957 to 1989.
3.5 Adjoining Properties
The adjoining property use was noted on October 15, 2014 by WSl3. The adjoining
property use is described below:
North: County Road 69 followed by residential properties and a commercial
strip mall (Shakopee Town Square)
East: Residential properties
South: Vacant wooded land and residential properties
West: County Road 69 followed by vacant land
Phase I Environmental Site Assessment
Parcels 69110120 and 279110260
%S11 Project No.1R11-420
Page R
4. User Provided Information
In order to satisfy the requirements of All Appropriate Inquiries (AM), the property
user was provided an environmental questionnaire. The user is the party seeking to
use the Phase I ESA and has specific obligations under ASTM E1527-13. WSB
provided a user questionnaire to Bruce Loney (City of Shakopee) for the purposes of
satisfying the user provided requirement for ASTM and AAI requirements.
Mr. Loney completed the questionnaire on October 13, 2014. Mr. Loney was not
aware of any pending litigation or pending/past administrative proceedings
relevant to hazardous substances or petroleum products or any pending
administrative proceedings associated with the property. In addition, he was not
aware of any environmental permits, underground storage tanks, aboveground
storage tanks, or environmental report documents (other than the information
included in Section 2.5) associated with the property. However, Mr. Loney
indicated knowledge of a leak associated with at the former Gopher State Truck Stop
located on the northern portion of the property as being possible REC. A copy of the
completed user questionnaire is included as Appendix C.
Phase 1 E nNironmental Site Assessment
Parcels 69110120 and 279110260
WSB Project No.1811-420
Page 9
5. Records Review
5.1 Regulatory Database Review
A Federal and State database records review was conducted by Environmental Data
Resources Inc. (EDR) a commercial regulatory database service provider. An EDR
Report was generated for the property on October 17, 2014. This report was used
to identify verified or potentially hazardous substances and petroleum releases
associated with the property,adjoining properties,and surrounding area. A copy of
the EDR report is included as Appendix D.
The Federal and State regulatory agencies database was evaluated and the
minimum search distances used are consistent with the ASTM E1572-13 Standard
Practice. The EDR Report includes descriptions of the databases examined and
radius maps showing the locations of the sites identified.
Property Listings
The EDR report identified one database listing determined to be located on the
property. Below is a summary of the identified property database listing:
Former Gopher State Truck Stop - This site is located at 11551 Johnson Memorial
Drive and is listed on the No Further Remediation Action Planned (CERC-NFRAP),
Minnesota List (MN LS), LUST, Financial Assurance, Site Remediation Section (SRS),
UST, and VIC databases. These listings are related to a leak (MPCA ID 701)
discovered at this site in 1988. The leak consisted of gasoline (unknown) and was
issued site closed by the MPCA in 1999. Site closure indicates the identified leak
was determined not to pose a threat to human health or the environment in its
current state. Site closure does not indicate the site is free of contamination. The
seven USTs with the site were reportedly removed in 1986.
This site was also entered in the MPCA VIC program (VP4510) in 1994 due to the
presence of non-petroleum related chemicals found in the groundwater. The MPCA
issued a No Action Letter for the VOCs 1,1,2-trichloroethene, 1,2-dicloroethane, and
trichloroethene compounds present in the groundwater at the site on August 23,
1994. A No Further Action Determination was later issued by the MPCA on June 26,
1998.
The property LUST and VIC database listings represent HREC at this time.
Additional property LUST and VIC details are included in Section 5.2 and additional
HREC definition information is included in Section 8.2.
Phase I Environmental Site Assessment
Parcels 69110120 and 279110260
SI3 Project No.1811-420
Page 10
Adjoining Property Listings,
The EDR report identified one database listings for sites adjoining the property.
Below is a summary of the identified adjoining property database listing:
K-Mart 9386 - This site is located east of the property at 1200 Shakopee Town
Square and is listed on the Conditionally Exempt Small Quantity Generator (RCRA-
CESQG) database. Inclusion on the RCRA-CESQG database means the site generates
100 kg or less of hazardous waste per calendar month. No indication of a hazardous
material release or violation was reported.
Based on the type of database listing, the adjoining database listing does not
represent a REC at this time.
Surrounding Area Listings
The EDR Report identified ten database listings within the search distance from the
property. The listings are associated with six surrounding area sites.The identified
listings include:
• One RCRA-CESQG listings;
• Two historic auto station (EDR US Hist Auto Stat) listings;
• One federal information system (FINDS) listing;
• One AST listing;
• One UST listing;
• One licensing information system (MDA-LIS);
• One LUST listing(closed by the MPCA);
• Two Financial Assurance listings.
Based on the database listing types, regulatory status (all the identified leaks have
been issued site closure by the MPCA), and distance from the property, the
identified surrounding area listings do not appear to be RECS at this time.
Not Mapped Listings
The EDR report identified six database listings as not mapped". These are sites
which EDR could not determine an exact location due to incomplete or inaccurate
database information. Based on the review of the listings, the sites appear to be
located beyond the appropriate search distance from the property and are not
considered RECs at this time.
Phase I Environmental Site Assessment
Parcels 69110120 and 279110260
N'SIt l'roject No.1811-420
Page 11
5.2 Regulatory File Review
ASTM Standard E1527-13 requires that a regulatory file review be conducted if the
property, or adjoining property, is listed on a public database. Based on the
information provided by EDR (see Section 5.1), a file review of one property LUST
site was deemed necessary. Ms. Dianne Mitzuk with the MPCA provided electronic
copies of available files on October 16, 2014 and WSB completed a file review at
MPCA's St. Paul office on October 20, 2014. Select electronic files are available upon
request. Based on the documents reviewed, below is a summary of the additional
information gathered:
Former Gopher State Truck Stop - This site is located on the northeastern portion of
the property (parcel 69110120) and was identified on the LUST database. The
Gopher State Truck Stop reportedly was in operation at the site from approximately
1957 to 1989 with the operating address of 11551 Johnson Memorial Drive. The
associated leak(MPCA ID 701) was discovered in 1988 and resulted from a leaking
10,000 gallon leaded gasoline underground storage tank(UST) and two 4,000 diesel
USTs. All associated USTs were reportedly removed from the site in 1989 and five
groundwater monitoring wells were installed. The site was issued site closure by
the MPCA on June 06, 1989. No indications of soil correction or remediation
activities were apparent in the site files. The documented petroleum leak at the
property is considered a HREC.
In addition, during the investigation of MPCA leak 701, VOCs were identified in
groundwater samples at the site. Specifically, 1,1,2-trichloroethene, 1,2-
dicloroethane, and trichloroethene were identified in the groundwater of the
Shakopee Limestone formation at the site above their respective MDH HRLs. The
site was entered into the MPCA Voluntary Investigation and Cleanup (VIC) program
in 1994 and was issued the facility ID of VP4510. Based on the likelihood that the
compounds originated from off-site,the MPCA issued a No Action Letter for the non-
petroleum release on August 23, 1994 conditioned on three successive year of
groundwater monitoring. A No Further Action determination was later issued by
the MPCA on June 26 1998. The documented VOC release at the property is
considered a HREC.
5.3 Physical Setting Information
Based on the Unites States Geological Survey (USGS) 7.5-minute topographic
quadrangle maps, the property elevation is 819 feet above mean sea level (amsl) as
outlined on Figure 2. The property grounds are relatively flat and slope to the
south/southwest. The property consists of minimally manicured grass areas and
included a wooded area on the northern portion. The newly constructed Vierling
Drive West transects the property.
Phase I Environmental Site Assessment
Parcels 69110120 and 279110260
■S'SB Project No.I811-420
Page 12
The Soil Survey of Scott County classified the property soils mainly as Dickman
sandy loam (0 to 2 percent slopes) as illustrated on Figure 3. The property surficial
geology consists of sand and gravel of the Langdon Terrace as illustrated on Figure
4. The underlying property bedrock consists of sandy dolomite Praire du Chien rock
of the Ordovician period (see Figure 5). Bedrock is estimated to occur at a depth of
approximately 40 feet below ground surface (bgs) at the property.
The Minnesota Department of Health (MDH) County Well Index was reviewed to
determine if registered wells are located on the property or surrounding area. One
verified well (ID 507541) was identified on the property and two verified wells (IDs
404373 and 206813) were identified in the surrounding area within 500 feet of the
property. In addition, two unverified wells (IDs 507542 and 507544) were
identified on the property. A well index search map is included as Figure 6. No
wells were observed on the property during the site visit.
Based on review of the well information and previous environmental reports, the
depth to groundwater is estimated to approximately 80 feet bgs and the property.
The general groundwater flow direction at the property is estimated to be north
towards the Minnesota River. It should be noted that groundwater levels can
fluctuate due to seasonal,natural,and manmade events.
5.4 Historical Use Information
WSB reviewed historical information to determine if past property uses have led to
RECs. WSB consulted historical sources that were readily available, practically
reviewable, and likely to be useful to determine the past history of the property
within the timeframe and constraints of this Phase I ESA. The sources consulted
included the following.
• Fire Insurance Maps: Sanborn fire insurance maps were requested from EDR
for the property. Often,areas of potential environmental concern,such as
locations of former storage tanks or hazardous substance storage,can be
identified by referencing fire insurance maps. The property was not covered in
the Sanborn fire insurance map search conducted by EDR. A copy of the
Certified Sanborn Map Report is included in Appendix E.
• City Directories: EDR provided city directories from Cole Information Services
for Johnson Memorial Drive and Old Brickyard Road. Directories from 1992,
1995, 1999, 2003, 2008, and 2013 were reviewed (see Appendix F). Based on
the directories reviewed,the following information was gathered:
Phase 1 Environmental Site;assessment
Parcels 69110120 and 279110260
WSB Project No.1811-420
Page 13
Property Addresses
The only known property address (11551 Johnson Memorial Drive) was not
listed in the directories reviewed.
Adjoining Property Addresses
No adjoining properties addresses were identified in the directories reviewed.
• Aerial Photographs: EDR provided historic aerial photography of the property
and surrounding area dating back to 1940. Aerial photographs were reviewed
for the years 1940, 1947, 1957, 1966, 1969, 1972, 1978, 1984, 1987, 1991, 1997,
2005, 2006, 2008, 2009, and 2010 (see Appendix G). In addition, a property
aerial from 2013 is included as Figure 1. Based on the aerial review, the
following observations were made:
Property Observations
The property was developed for agricultural purposes in the 1940 through 1957
photographs. The former Gopher State Truck Stop (including a building and
truck/trailer storage) is present on the northern portion of the property on the
1966 through 1987 photographs. The service road providing access to the
Shakopee Town Square is present on the northern portion of the property in the
1978 and subsequent photographs. The northern portion of the site is a vacant
wooed lot in the 1997 through 2013 photographs.
Adjoining Property Observations
North -The adjoining land to the north (across County Road 69) of the property
is occupied by the residential properties in the 1940 through 2013 photographs.
The strip mall to the northwest of the property (Shakopee Town Square) is
present on the 1978 and subsequent photographs.
East-The adjoining land to the east of the property is developed for agricultural
purposes in the 1940 through 1991 photographs. The residential townhome
complex to the east is present on the 1997 and subsequent photographs.
South - The adjoining land to the south of the property is developed for
agricultural purposes in the 1940 through 1957 photographs. Residential
houses are present on the 1966 through 1987 photographs and are not present
on the 1991 photograph. The land to the south was vacant in the 1997
photograph and developed with a residential townhome complex (to the
southeast) in the 2005 and subsequent photographs.
Phase I L:rrvironmental Site Assessment
Parcels 69110120 and 279110260
WSIt Project\o.1811420
Page 14
West - The adjoining land to the west of the property is developed for
agricultural purposes in the 1940 through 1991 photographs. The realignment
of County Road 69 is first apparent on the 1997 and subsequent photographs.
The land to the west (across County Road 69) is vacant on the 1991 and
subsequent photographs.
• Topographic Map: EDR provided historic USGS topographic maps for the
property and surrounding area. Topographic maps were reviewed for the years
1905, 1958, 1972, and 1993 (see Appendix H). Based on the topographic map
review,the following observations were made:
Property Observations
The property is depicted as undeveloped in the maps reviewed. No evidence of
railroads, mining,dumping, or chemical storage was depicted at the property on
the maps reviewed.
Adjoining Property Observations
The adjoining properties are depicted as undeveloped in the maps reviewed,
except for the Shakopee Town Square buildings (east of the property) which are
depicted on the 1993 map. No evidence of railroads, mining, dumping, or
chemical storage was depicted at the property on the maps reviewed.
• City Building and Inspection File Review: WSB visited the Shakopee Building
and Inspection Department on October 15, 2014. The City had no available
records since the property was historically located in Jackson Township. The
City advised searching the Scott County records.
• Scott County Building and Inspection File Review: WSB visited the Scott
County Building and Inspection Department on October 15, 2014. Mr. Peter
Scott provided the available property building and inspection file pertaining to
the property. The file contained an MPCA No Further Action Letter dated June 8,
1998 and a demolition permit associated with the former Gopher State Truck
Stop dated October 11, 1989. No additional information was included in the file.
Phase 1 Environmental Site Assessment
Parcels 69110120 and 279110260
WSB Project No.1811-420
Page 15
6. Site Reconnaissance
6.1 Methodology
WSB conducted observations of conditions at the property and adjoining properties
on October 15, 2014. The site reconnaissance included a walkthrough of all
accessible property areas and adjoining properties. The adjoining property
observations were limited to the public right-of-way and no access limitations were
encountered.
6.2 General Site Setting
The property is generally flat and slopes gradually to the south-southwest. The
grounds are comprised of minimally maintained grass areas and include a wooded
lot on the northern portion. In addition, a stormwater pond is located on the
southeastern portion of the property.
6.3 Exterior Observations
WSB conducted observations of the property,adjoining properties, and surrounding
area on October 15, 2014. Site reconnaissance photographs are included in
Appendix B. A summary of the site reconnaissance is outlined in the table below:
Site Reconnaissance Summary Table
Observed
Issue During Site Comments
Visit
Yes No
Aboveground /
Underground X None observed,
Storage Tanks
Drums/Containers X None observed.
Animals X None observed.
Buildings/Structures X None observed.
Construction/Demolition An asphalt pile, two concrete footings,
debris X and numerous concrete light poles were
present at parcel 69110120.
Drainage Ditches X None observed
Dirt/Spoil Piles X Two dirt piles were present at parcel
69110120.
Floor Drains X None observed.
/Sumps/Vaults
Hazardous X None observed.
Substances/Petroleum
Phase 1 lIn%ironmental Site:■ssessment
Parcels 69111)120)and 279110260
VI SR Project No.1811-420
Page 16
Observed
Issue During Site Comments
Visit
Products
Landfills X None observed.
Odors X None observed.
Oil/Water Separators X None observed.
Pipelines or Utilities X None observed.
Pits, Ponds, Lagoons X None observed.
Pools of Liquid X None observed.
Railroad Spurs X None observed.
Septic Systems X None observed.
Solid Waste Disposal X None observed.
Solvents X None observed.
Spills or Releases X None observed.
Stained Soil/Concrete X None observed.
Stressed or Dead X None observed.
Vegetation
Transformers X None observed.
Unidentified Substances X None observed.
Wastewater Discharge X None observed.
From Property
Wells X None observed.
Asbestos X None observed.
Lead-Based Paint X None observed.
Mold/Moisture X None observed.
An asphalt pile,two large concrete footings,and numerous concrete light poles were
present on parcel 69110120 at the property. In addition, the two soil piles were
also present on parcel 69110120. The presence of the construction debris is an item
of environmental note (see Section 8.6). No other environmental issues or items of
concern were observed at the property,or adjoining properties, during the site visit.
Phase 1 Environmental Site:1.ssesstneut
Parcels.69110120 and 279110260
%S SR Project No. 1811.420
Page 17
7. Interviews
WSB conducted interviews with individuals who may have knowledge of current or
past information regarding the property. Specifically, WSB made inquiries
regarding knowledge of existing or former storage tanks, leaks, dumps, spills,
drums, mold, clandestine drug labs, environmental documents, or potential
environmental concerns associated with the property. The following individuals
were contacted in person,phone,email,or via questionnaire:
Interview Summary Table
Resource Title or Organization Results of Interview
Mr.Loney completed a user
questionnaire on 10-13-14 and
indicated knowledge of a leak on the
Bruce Loney City of Shakopee Public property(former Gopher State
Works Director Truck Stop)on the questionnaire
(see Appendix C). The presence of
these closed leak site was
determined to be HREC.
Mr.Smith indicated knowledge of
Scott County Environmental the former Gopher State Truck Stop
Peter Schmidt Health Supervisor and also provided WSB with the
parcel 6911020 building and
inspection file(see Section 5.4).
Tom Pitschneider City of Shakopee Fire Mr. Pitschneider did not have any
Marshal information on the property.
Phase 1 Environmental Site Assessment
Parcels 69110120 and 279110260
1W'S13 Project No.1811-420
Page 18
8. Findings and Opinions
8.1 Recognized Environmental Conditions
This Phase I ESA has revealed no RECs associated with the property.
8.2 Historical Recognized Environmental Conditions
The ASTM E1572-13 Standard defines the term historical recognized environmental
condition (HREC) as meaning "a past release of any hazardous substance or
petroleum products that has occurred in connection with the property and has been
addressed to the satisfaction of the applicable regulatory authority or meeting
unrestricted residential use criteria established by a regulatory authority, without
subjecting the property to any required controls (e.g., property use restrictions,
Activity and Use Limitations (AULs), institutional controls, or engineering controls).
Before calling the past release a HREC, the environmental professional (EP) must
determine whether the past release is a REC at the time the Phase I ESA is
conducted (e.g., if there has been a change in the regulatory criteria). If the EP
considers this past release to be a REC at the time the Phase I ESA is conducted, the
conditions shall be included in the conclusion section of the report as a REC."
Based on this assessment, the following HRECs have been identified in connection
with the property:
HREC- 1:Petroleum Release(Former Gopher State Truck Stop)
This site is located on the northeastern portion of the property (parcel 69110120)
and was identified on the leaking underground storage tank (LUST) database. The
former Gopher State Truck Stop reportedly was in operation at from approximately
1957 to 1989. The associated leak (Minnesota Pollution Control Agency (MPCA) ID
701) was discovered in 1988 and resulted from a leaking 10,000 gallon leaded
gasoline underground storage tank (UST) and two 4,000 diesel USTs. All associated
USTs were reportedly removed from the site in 1989 and five groundwater
monitoring wells were installed. The site was issued site closure by the MPCA on
June 06, 1989. No monitoring wells or evidence of a petroleum leak was observed at
this site during this assessment.The documented petroleum release at the property
is considered a HREC.
HREC-2:Non-Petroleum Release(Former Gopher State Truck Stop)
During the investigation of MPCA leak 701, VOCs were also identified in
groundwater samples at the property. Specifically, 1,1,2-trichloroethene, 1,2-
dicloroethane, and trichloroethene were identified in the groundwater of the
Shakopee Limestone formation at the property above their respective Minnesota
Department of Health (MDH) Health Risk Limits (HRLs). Based on the likelihood
Phase I Environmental Site Assessment
Parcels 69110120 and 279110260
%'SB Project No.1811-420
Page 19
that the compounds originated from off-site, the MPCA issued a No Action Letter for
the non-petroleum release on August 23, 1994 conditioned on three successive year
of groundwater monitoring. A No Further Action determination was later issued by
the MPCA on June 26, 1998. The documentation of non-petroleum release at the
property is considered a HREC.
A HREC location map is included as Figure 7.
8.3 Controlled Recognized Environmental Conditions
The ASTM E1572-13 Standard defines the term controlled recognized environmental
condition (CREC) as meaning "a REC resulting from a past release of hazardous
substances or petroleum products that has been addressed to the satisfaction of the
applicable regulatory authority (e.g, as evidence by the issuance of NFA letter or
equivalent, or meeting risk-based criteria established by regulatory authority),with
hazardous substances or petroleum products allowed to remain in place subject to
the implementation of required controls (e.g., property use restrictions, AULs,
institutional controls, or engineering controls). A CREC shall be listed in the
Findings Section of the Phase I ESA report, and as a REC in the Conclusions Section
of the report"
Based on this assessment, WSB did not identify any CRECs in connection with the
property.
8.4 Vapor Intrusion
This investigation has revealed a LUST site associated with the property. The
property LUST sites was determined to be a HREC as summarized in Section 8.2.
There is a potential that the LUST site have resulted in vapor impacts to the
property. If future property development involves disturbances near this site
(former Gopher State Truck Stop),vapor monitoring should be administered during
construction activities and vapor controls (i.e. vapor membrane or vapor mitigation
systems) may be incorporated to reduce vapor intrusion risks to buildings and/or
utilities trenches.
8.5 De Minimis Conditions
No de minimis conditions were identified during this assessment. A de minimis
condition is a condition that does not threaten human health of the environment
and generally would not be subject to enforcement action. Conditions determined
to be de minimis are not recognized environmental conditions.
Phase 1 Environmental Site Assessment
Parcels 69110120 and 279110260
%SB Project No. 1811-420
l'age 20
8.6 Items of Environmental Note
The following environmental items should be noted:
Soil and Asphalt Piles
Two soil piles and one asphalt pile were observed on the northeastern portion of
the property at the former Gopher State Truck Stop (parcel 69110120). The soil
mounds were approximately 100 cubic yards in size and were covered with
vegetation. The asphalt pile was approximately 500 cubic yards in size and
observed to be uniform. No construction debris or evidence of regulated waste was
observed in the piles during the site visit.
Concrete Foundations and Light Poles
Two large concrete foundation pieces and numerous light pole footings were
observed on the northeastern portion of the property at the former Gopher State
Truck Stop (parcel 69110120). The concrete foundation pieces were approximately
4 cubic yards in size and were removed from the ground. The light poles footings
approximately 0.5 cubic yard in size and in place during the site visit.
Phase I Environmental Site Assessment
Parcels 69I 101211 and 279110260
IA S13 Project No. I011-4211
('age 21
9. Recommendations
WSB has performed this Phase I ESA in conformance with the scope and limitations
of ASTM Practice E1527-13 for the property consisting of parcels 69110120 and
279110260 in Shakopee, MN. Exceptions to, or deletions from, this practice are
described in Section 2.3 of this report.
This Phase I ESA has revealed no RECs and two HRECs associated with the property
as described in Section 8.1 and Section 8.2.
As a result of the documented historical releases, a Limited Phase II ESA is
recommended at the property to assess current subsurface soil, soil vapor, and
groundwater conditions against current regulatory criteria as an option for the
property is future development. The Phase II ESA should focus on the former
Gopher State Truck Stop (parcel 69110120) located on the northern portion of the
property and include analytical testing of both petroleum and VOC constituents.
Based on the results of the Phase II ESA, a Response Action Plan (RAP)/
Construction Contingency Plan (CCP) may be necessary to ensure unexpected
contaminated materials encountered during redevelopment are properly identified,
managed, and addressed. The RAP/CCP document should include: procedures for
handling and providing proper characterization and disposition for soil excavated to
accommodate the new structures and underground utilities; provisions for
installing vapor barriers beneath new structures and in utility trenches (if
necessary); and venting systems for new structures (if necessary). It is also
recommended that the City consult with the MPCA regarding applicable vapor
intrusion policies for the development of the property pending the Phase II ESA
results.
Phase 1 Environmental Site Assessment
Parcels 691101211 and 279110260
NS SH Project No.1811-120
Page 22
10. Data Gaps
Data gaps are defined as a lack of or inability to obtain information required by the
standards and practices despite good faith efforts. Good faith efforts were taken to
obtain information about the property from a variety of readily available, practically
reviewable,and likely to be useful sources. However,the following information was
not able to be obtained:
• Title, Environmental Liens, or Activity and Use Limitation Search were not
provided.
Please note that the lack of recorded sources listed above is considered a data gap
but is not considered a material limitation for the completion of this Phase I ESA.
Phase I Environmental Site Assessment
Parcels 69110120 and 279110260
WSB Project No. 1811-420
Page 23
11. Qualifications of Environmental Professionals
To the best of our professional knowledge and belief, we have met the definition of
Environmental Professional as defined in CER 312.10. We have the specific
qualifications based on education, training, and experience to assess a property of
the nature, history, and setting. We have developed and performed all appropriate
inquiries in general conformance with acceptable standards and practices in the
industry.
Phase 1 Environmental Site Assessment
Parcels 69110120 and 279110260
14:S11 Project No.1811-420
Page 24
FIGURES
Phase I Environmental Site Assessment
Parcels 69110120 and 279110260
WSB Project No,1811420
APPENDICES
pxwuogeoo1 parcud IBId\sdelrytSiJoZt,VI18I.as-ri
--; •'* `1';'-itit 1....1r4lrit r r „ .'.:,,t.„„ ,''',,t..-it „;ii 1 ,r , "' 7,' el ioj,:i ,
. ,.. .
�g W „. ,,,<, Al..,,.,
,tr+
y .-� .
dd
` :
Y
C I T
¢ ^ Si HVSo ?.
R
o, f r r -?- ,
��
,
1 4JuirO a 110(auirto O
o IS ifs r - r { r 7: : 2 a.
Sri - , 4i -' v t w„ i. i5 „fit p
r
Is
v , #a /
i`
_ F
,r •E - ' 'J'' a+ rf VC'''‘ ,. a" C. .
' ' ! Y
a. x '£`* 1 Vii. .1.i. +.:# TI. .. f p $ t »k M
.. a e. }•+w a 7 {.s-..
CD
;9" i S'i i c d 0
,N.
ti
o. IN, / !p ,. C
N 0
k. ' SJ / r ' ti -0 J
`� r � . J i' C ..)
x_ chaparral Ave ('1�
LA..,-;—
<,
CD I
I
r�• "" P2!Peel 1 PIO
co
# M sw o)
M•.. acT . a4 w �h cx
9 �
CO
'> fix, r ." e. ,�, ,• ,
- .. I-s+r
! f� v„_r r., ,ak t < w
aA a • wt x t y ;'sy � x+, i r '4;2'14n R,i!'°:!*.**,.drF NMn ,^,.4.
81
�S ♦t xyy ! T
�t,
..
o°y ?..
f
- -. z' % ,v 4 *- _�W,,
'�* s gam.
44- ...r
,. x r
'�` "g• -
. 1
I
....,
-4 4 74 1- " ',. •j• 1
‘„
,,,.
.tV t 11
li.. i,..1 ,- r
...-....,:„..4ff.ft,..., ,,,, ,-**,441 4 i
_.. '.,i- 10,:io.1 :§7,,' 4"./ * ,
- - - - - / ., , '1*, t •mrt.7r=r=t-k"-7.7": "
„ ...
* ft
- t *it. - = _ II ,:l., i
C.--
—
1 4'''... 11---:' • 4
4 44 4. flif
-44
.,,,,, , ,• 1
4 V*
.....• ' - . .,,. ,
m , ,, - _ —. -.1e-. .. ... .3 1,, ,,, ,. ,. * jar -...,
-.4, . 4*. , ,-, r '4
_ .
. ,
. . -- ,,-
, , -
. cs
0 p. , I
kjoi,4 ,..,„..., v / t ; .,.... ' t
i' .... ..«. .
.
itt. * -,t
. t ,i
..
. -, .... . to t t 1, ;:',tt-`
' g .
os .
t '1.1 ' . 4.' - _ 1, - . 1..dikr,1 at 4,
•
N Itt, •a,ta, ‘11.74 8' * 'r
7
4 , f• 7 'ff- '.. * 4-4
,4 -,, ..... __,-.44.010........._2 f • • -
' 4, .+.- •10
- . •64,, ., <04,
. ,
f•
-''4-tikf 7 • ''' ''''''-' -
*
.„....
...
II
, , '•
. v*
.,
-t, .....
.,.. . ,
... .
--.. , ..,.. -.
=
i .
.' '"---.t'-'4 , ::'-' '„ -'-,4::'-•:, ':r,„:1‘./.-.:,,a44-;i--;,'"'"4'.,,..-."''.1*-:-i-' ',1,- , .. . . '.. - „.'.- '''.a:
•;''''''''' ,i
Ir.
1
WSB
&Assoc- engineering.planning•environmental•construction 701 Xenia Avenue South
Suite 300
Minneapolis,MN 55416
Tel: 763-541-4800
Fax: 763-541-1700
October 30,2014
Mr.Bruce Loney
Shakopee Public Works Director
400 Gorman Street
Shakopee,MN 55379
Re: Scope of Work&Cost—Limited Phase II ESA&MPCA Petroleum Brownfields Services for
Parcel 69110120 located in Shakopee,MN 55379
Dear Mr. Loney:
Outlined below is the scope of work and cost to perform a Limited Phase II Environmental Site
Assessment (ESA) and MPCA Petroleum Brownfields Services for Parcel 69110120 (as known as the
former Gopher State Truck Stop) located in Shakopee, MN (the property). The historic leak associated
with the property (MPCA ID 701) was discovered in 1988 and originated from an underground storage
tank(UST). Soil excavation/remediation activities were reportedly completed on the northeastern portion
of the property in 1996 during the County Road 69 realignment to facilitate the Highway 169/101
reconstruction project. Petroleum impacted soil was stockpiled on the property and approximately 500 to
600 cubic yards of soil with organic headspace readings less than 10 parts per million (ppm) were thin
spread on the property and on the adjoining parcel(279110260).
The purpose of the Limited Phase II ESA is to evaluate the subsurface soil (up to 24 feet below ground
surface [bgs]) conditions at the property. The results of the investigation will be used to determine an
approximate soil correction cost that will be incurred during future redevelopment of the property. In
addition, the property will be enrolled into the MPCA Petroleum Brownfields Program in order for the
City (and successive purchasers of the property) to not be held responsible under state statute for the
contamination identified at the property. The following tasks are anticipated to be performed as part of
the Limited Phase II ESA and MPCA Petroleum Brownfields Services:
Task 1: Limited Phase II ESA-$9,314
Minnesota Department of Transportation(MnDOT)Permitting
WSB will submit and secure all required MnDOT permits prior to initiation field work activities. The
anticipated MnDOT permits include:
• MnDOT Miscellaneous Work on Truck Highway Right of Way
Utility Locate
Prior to conducting subsurface work, all utilities will be located by conducting a Gopher State One Call
and a private utility locate firm(if necessary).
St.Cloud• Minneapolis•St.Paul
Equal Opportunity Employer
wsbeng.com
Mr. Bruce Loney
Limited Phase II ESA&MPCA Petroleum Brownfields Services
October 30, 2014
Page 2
Soil Borings& Sampling
The soil boring sampling activities will consist of the following:
• Advancing six(6)soil boings to a depth of 24 feet bgs.
• Advancing three(3)soil vapor borings to a depth of 8 feet bgs.
• Screening soils using a photoionization detector(PID)with a 10.6 eV lamp.
• Collecting one soil sample from each boring(total of 6)and analyzing for:
o Diesel range organics(DRO)using the Wisconsin Method
o Gasoline Range organic(GRO)using the Wisconsin Method
o Volatile organic compounds(VOCs)using USEPA Method 8260
• Collecting three soil vapor samples(total of 3)and analyzing for:
o VOCs using USEPA TO-15
• Submitting all analytical samples to a MN certified laboratory.
• Abandoning all borings per Minnesota Department of Health(MDH)requirements.
Assumptions: The property is tree covered and tree removal will likely be required prior to field boring
activities and with approval by MnDOT. It is assumed that the City will perform all necessary tree
removal.
Composite Soil Stockpile Sampling
Composite sampling will be completed on the two soil stockpiles present at the property for
characterization purposes. The composite soil stockpile sampling activities will consist of the following:
• Collect representative composite soil samples from the two soil stockpiles using a hand auger
and in accordance with the MPCA soil sampling guidance 4-04.
• Screening soils using a PID with a 10.6 eV lamp.
• Collecting one representative composite soil sample from each mound (total of 2) and
analyzing for the following parameters:
o DRO using the Wisconsin Method
o GRO using the Wisconsin Method
o VOC using USEPA Method 8260
• Submitting all analytical samples to a MN certified laboratory.
Reporting
WSB will summarize the results of the Phase II ESA in a final report. At a minimum, the report will
include the following:
• Scope of work
• Sample location map
• Sample methods and procedures
• Investigation results
• Conclusions and recommendations
Mr. Bruce Loney
Limited Phase II ESA&MPCA Petroleum Brownfields Services
October 30, 2014
Page 3
Task 2: MPCA Petroleum Brownfields Services-$1,223
Petroleum Program Application
WSB will complete the required application and compile the proper documentation to enroll the property
into the MPCA Petroleum Brownfields technical assistance program. It is anticipated that the following
liability assurance letters will be requested:
• Petroleum Leak Site File Closure Confirmation Letter
• Leak Site Tank Removal Verification Letter
Note: The MPCA charges $125 per hour for technical assistance review which will be billed to the
enrollment applicant and is not included in this scope. It is estimated that the MPCA review fees will be
$500.
MPCA Correspondence
WSB will coordinate with the MPCA via phone and email to ensure all required application and
environmental documents are received. WSB will also ensure the enrollment and review process is
completed in a timely manner and the applicant receives adequate updates on the process/status.
Typically,the MPCA's application review process takes approximately 30 days to complete.
Total Cost and Schedule
The cost to perform the described Limited Phase II ESA and MPCA Petroleum Brownfields Services is a
lump sum of $10,537. If during additional services are required beyond the above scope WSB will
perform the work on a time and materials bases upon approval from the City. Upon authorization, the
field work can be performed as early as the week of November 17, 2014 and preliminary laboratory
results will be available 10 business days after the investigation. If you wish to authorize this work,
please sign below and submit a copy to WSB.
Sincerely,
WSB&Associates,Inc.
gi"'`412-04 ?f4+1..0,Ottalla
Ryan Spencer Jamie Wallerstedt, PE
Environmental and Remediation Scientist Project Manager
I hereby authorize the above scope of work, schedule,and cost.
Signature
Date